<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/Home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card class="box-card">
      <el-alert
        center
        title="添加商品信息"
        type="info"
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!-- tab栏区域 -->
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="tabBeforeLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <!-- 级联选择器 -->
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
                clearable
              >
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染动态参数的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <!-- 渲染静态属性的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary" class="red_btn"
                >点击上传</el-button
              >
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor
              ref="myQuillEditor"
              v-model="addForm.goods_introduce"
            />
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="red_btn addBtn" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
      <!-- 图片预览对话框 -->
      <el-dialog
        title="图片预览"
        :visible.sync="previewDialogVisible"
        width="50%"
      >
        <img :src="previewPath" alt="" class="previewPic" />
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
import _ from "lodash";

export default {
  data() {
    return {
      activeIndex: "0",
      // *添加商品的表单数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [], //商品分类
        pics: [], //商品图片
        goods_introduce: "", //商品详情介绍
        attrs: [], //商品的参数数组
      },
      // *添加商品的表单验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
      // *商品分类列表
      cateList: [],
      // *级联选择器的双向绑定选中的id的数组
      // selectedCateKeys: [],
      // *级联选择器的配置对象
      cateProps: {
        expandTrigger: "hover",
        value: "cat_id",
        label: "cat_name",
        children: "children",
        checkStrictly: true, //*控制可以选中一级选项
      },
      // *动态参数列表
      manyTableData: [],
      // *静态属性列表
      onlyTableData: [],
      // *图片上传的后台url
      uploadUrl: "http://127.0.0.1:8888/api/private/v1/upload",
      // *上传图片的请求头设置
      headersObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      // *图片预览时的路径
      previewPath: "",
      // *图片预览对话框的显示与否
      previewDialogVisible: false,
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    // *获取商品分类列表
    async getCateList() {
      const res = await this.$http.get("categories");
      if (res.data.meta.status !== 200) {
        this.$message.error("获取商品分类列表失败！");
      }
      this.cateList = res.data.data;
    },
    // *级联选择框选中的发生变化 会触发此函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    // *商品分类如果没选择  阻止tab切换
    tabBeforeLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类！");
        return false;
      }
    },
    // a tab被选中时触发
    async tabClicked() {
      if (this.activeIndex === "1") {
        const res = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" },
          }
        );
        if (res.data.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败！");
        }
        res.data.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableData = res.data.data;
      } else if (this.activeIndex === "2") {
        const res = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" },
          }
        );
        if (res.data.meta.status !== 200) {
          return this.$message.error("获取静态属性列表失败！");
        }
        this.onlyTableData = res.data.data;
      }
    },
    // *图片预览的处理函数
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.previewDialogVisible = true;
    },
    // *图片移除的处理函数
    handleRemove(file) {
      // 1.获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path;
      // 2.从pics数组中根据路径找到索引值
      const i = this.addForm.pics.findIndex((x) => {
        x.pic === filePath;
      });
      // 3.根据索引值删除当前项
      this.addForm.pics.splice(i, 1);
    },
    // *图片上传成功的处理函数
    handleSuccess(response) {
      // 1.处理图片的信息
      const picInfo = { pic: response.data.tmp_path };
      // 2.将图片信息保存在pics中
      this.addForm.pics.push(picInfo);
    },
    // *添加商品按钮的点击事件
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项！");
        }
        // *执行添加的业务逻辑 先对请求参数做处理
        // 1.goods_cat 数组变字符串
        // lodash cloneDeep 深拷贝 拷贝出来的新对象改变 不改变原对象
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        // 2.attrs 把动态参数和静态属性列表的数据 按要求放入attrs数组中
        // 动态参数
        this.manyTableData.forEach((item) => {
          const manyInfo = {
            attr_id:item.attr_id,
            attr_value: item.attr_vals.join(' '),
          };
          this.addForm.attrs.push(manyInfo)
        });
        // 静态属性
        this.onlyTableData.forEach((item) => {
          const onlyInfo = {
            attr_id:item.attr_id,
            attr_value: item.attr_vals,
          };
          this.addForm.attrs.push(onlyInfo)
        });
        form.attrs =  this.addForm.attrs
        // *发起请求添加商品 商品的名称必须唯一
        const res = await this.$http.post('goods',form)
        if(res.data.meta.status!==201){
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
});
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>

<style scoped lang="less">
.el-alert {
  padding: 10px 0;
}
.previewPic {
  width: 100%;
}
.addBtn {
  margin-top: 20px;
}
</style>
